Apple has seeded fourth beta update version of OS X Mavericks 10.9.4 to OS X developers and non-developers (general public users). The official Direct Download Links of Mac OS X 10.9.4 Beta 4 (Build: 13E25) Mavericks Combo / Delta Update .DMG File is available below to update / upgrade your current old software version.
OS X 10.9.4 Beta 4 (13E25) Features and Changes
The changelog of Mac OS X Mavericks 10.9.4 Beta 4 (Build: 13E25) Update holds fixes, improvements, enhancements, stability for Safari, App Store, Graphics and Audio Drivers, Finder Bluetooth etc.
How to Download and Install OS X 10.9.4 Beta 4 (13E25) Update Manually?
Apple Mac OS X users and developers can automatically update/upgrade via Mac App Store >> Software Update tab, if running old OS X 10.9.4 Beta 3 (13E19) software version.
Registered Apple Mac OS X developers can download OS X 10.9.4 Beta 4 (13E25) via OS X Dev Center website officially.
Mac OS X non-developers (general public) and Public Beta Seed Program subscribe users can go to Mac OS X Beta Seed Program website to download OS X 10.9.4 Beta 4 (Build: 13E25) for Free, and can install the updates manually via iTunes without registration of Apple UDID or having Mac OS X Developer Account.